Fundamental and flotation techniques assessing the effect of water quality on bubble-particle attachment of chalcopyrite and galena

L. L. October, M. S. Manono, J. G. Wiese, N. Schreithofer, K. C. Corin*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Bubble-particle attachment has been studied in the most fundamental way from as early as 1934 by bringing a bubble into contact with a flat mineral surface and since then, techniques measuring this interaction have advanced. Water quality within flotation will impact the bubble particle attachment and as more operations recycle their water on site, an understanding of this process becomes vital. This study uses an Automated Contact Time Apparatus (ACTA) to assess the effect of water quality on bubble-particle attachment of selected sulfide minerals; galena and chalcopyrite, from a fundamental perspective. Classical microflotation tests are complemented with collector adsorption and mineral potential under degrading water quality to validate the ACTA and gain an understanding of the effect of water quality on bubble-particle attachment as well as subsequent flotation. This investigation showed that the results from the ACTA qualitatively showed similar trends as that of the classical microflotation technique for measuring floatability, however the quantitively these methods showed very different results. Due to the dynamic nature of the microflotation technique it may be assumed that plant recovery will resemble the results from this technique closer than that of the ACTA. Furthermore, this investigation showed an increase in zeta potential of both minerals as the concentration of inorganic electrolytes in the water increased. It can thus be speculated that the increase in bubble-particle attachment with increasing ionic strength of synthetic plant water may be attributed to electrical double layer compression and particle agglomeration.

Original languageEnglish
Article number106880
Number of pages7
JournalMinerals Engineering
Volume167
Early online date1 Apr 2021
DOIs
Publication statusPublished - 15 Jun 2021
MoE publication typeA1 Journal article-refereed
EventInternational Flotation Conference - Vineyard Hotel, Cape Town, South Africa, Cape Town, South Africa
Duration: 11 Nov 201914 Nov 2019
Conference number: 9
http://www.min-eng.com/flotation19/

Keywords

  • Bubble-particle attachment
  • Chalcopyrite
  • Froth flotation
  • Galena
  • Ions
  • Water quality

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